Sometimes mistaken as clothes moths,they tend to fly a zigzag pattern around rooms (kitchens and pantries). These moths fly mostly at night and are attracted to lights. Occasionally, the larvae or “white worms with black heads” crawl up walls and suspend from the ceiling attached to a single silken thread. Some adult moths do fly into premises during summer months through open doors or windows, but most “hitchhike” inside in packaged goods and groceries. Not only homes, but restaurants, grocery stores, warehouses, pet stores, seed companies, mills etc., become infested.

Adult moths are about 3/8-inch (8 to 10mm) long when at rest and have a wing spread of about 1/2 to 3/4 inch (18 to 20mm). When viewed from above with the wings folded over the back, the outer 2/3 of the wing appears reddish-brown or bronze coloured “at the wing tips” while the inner 2/3 of the wing “at the basal portion” is light grey to ochre-yellow. Also, the head and thorax are reddish-brown and the hind wings grey. The larvae or “caterpillars” are about 2/3 inch (12.5mm) when mature. Brown-headed larvae are dirty white, sometimes tinged pink or green. Larvae are quite active and moult four to seven times before pupating (see picture below of larvae on prunes). Pupae are reddish-brown and about 3/8-inch long. Eggs are greyish to dirty white and from 0.3 to 0.5mm long.

The female moth lays between 60 and 300 eggs, singly or in clusters, on or near the foodstuffs. Eggs hatch in 2 to 14 days with larvae or “tiny whitish caterpillars” dispersing within a few hours. Larvae move to foodstuffs, and feed in or near a tunnel-like case of frass and silk which they web together. Some food becomes matted with silken webbing. The larval stage is the feeding or “pest stage,” and may range from 2 to 41 weeks, depending on the temperature. In stored grains, feeding is done at the surface. When ready to pupate, mature larvae leave their tubes and spin a silken cocoon. They often migrate or “wander” a considerable distance from their food source before finding the pupation site, often in cracks and crevices. Some crawl up walls to where the wall and ceiling meet or crawl to the top of the cupboard to spin the cocoon in which they pupate and from which new adult moths emerge. Mating occurs and the life cycle is repeated. The life cycle may range from the shortest period of four weeks to the longest of 300 days. Under good conditions, the entire life cycle requires six to eight weeks. However, in cold climates, larvae overwinter and pupate in March. Moths emerge in April. Generations overlap as the season progresses. There may be five generations per year in some locations. The life cycle depends on temperature, taking two to six months in temperate zones and three to four weeks in warm climates.

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Blackley wasp control treatments are safe and provide excellent value for money. We offer a comprehensive wasp nest treatment service for a fixed price of £35.00. We also cover Stockport, Cheshire and Warrington areas. We are specialists in wasp nest control and also hornet nest treatments. We also provide a same day service, so for those people that really don't like wasps at all, we are here to help and we guarantee that we kill wasp nests dead.